MATLAB: Syntax error

sytax error

I am trying to run a simulink block diagram simulation. I have the following function in a func block: (-1/(J/(X^2)+m))*(m*g*sin(u(3))-m*u(1)*(u(4))^2)
no matter what I do I continue to get a sytax error and I simply cannot see what the problem is. Can someone please take a look at this and tell me I am blind.

Best Answer

There doesn't seem to be anything wrong just based on your syntax.
However, some things to think about...
  1. Are all the parameters defined in your workspace? It seems as though you've used an uppercase X and J, so be careful there.
  2. Is the input signal to the function block a vector with at least 4 elements? You can select Format -> Port/Signal Displays -> Signal Dimensions to see this.
Good luck.
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